diff --git a/tasmota/xdrv_10_rules.ino b/tasmota/xdrv_10_rules.ino
index c1dfa277e..1c3345fd7 100644
--- a/tasmota/xdrv_10_rules.ino
+++ b/tasmota/xdrv_10_rules.ino
@@ -99,8 +99,10 @@
 #define COMPARE_OPERATOR_STRING_ENDS_WITH      8
 #define COMPARE_OPERATOR_STRING_STARTS_WITH    9
 #define COMPARE_OPERATOR_STRING_CONTAINS      10
-#define MAXIMUM_COMPARE_OPERATOR              COMPARE_OPERATOR_STRING_CONTAINS
-const char kCompareOperators[] PROGMEM = "=\0>\0<\0|\0==!=>=<=$>$<$|";
+#define COMPARE_OPERATOR_STRING_NOT_EQUAL     11
+#define COMPARE_OPERATOR_STRING_NOT_CONTAINS  12
+#define MAXIMUM_COMPARE_OPERATOR              COMPARE_OPERATOR_STRING_NOT_CONTAINS
+const char kCompareOperators[] PROGMEM = "=\0>\0<\0|\0==!=>=<=$>$<$|$!$^";
 
 #ifdef USE_EXPRESSION
   #include <LinkedList.h>                 // Import LinkedList library
@@ -589,7 +591,13 @@ bool RulesRuleMatch(uint8_t rule_set, String &event, String &rule, bool stop_all
         match = str_str_value.startsWith(rule_svalue);
         break;
       case COMPARE_OPERATOR_STRING_CONTAINS:
-        match = (str_str_value.indexOf(rule_svalue) > 0);
+        match = (str_str_value.indexOf(rule_svalue) >= 0);
+        break;
+      case  COMPARE_OPERATOR_STRING_NOT_EQUAL:
+        match = (0!=strcasecmp(str_value, rule_svalue));  // Compare strings - this also works for hexadecimals
+        break;
+      case  COMPARE_OPERATOR_STRING_NOT_CONTAINS:
+        match = (str_str_value.indexOf(rule_svalue) < 0);
         break;
       default:
         match = true;
@@ -1634,7 +1642,13 @@ bool evaluateComparisonExpression(const char *expression, int len)
       bResult = leftExpr.startsWith(rightExpr);
       break;
     case COMPARE_OPERATOR_STRING_CONTAINS:
-      bResult = (leftExpr.indexOf(rightExpr) > 0);
+      bResult = (leftExpr.indexOf(rightExpr) >= 0);
+      break;
+    case  COMPARE_OPERATOR_STRING_NOT_EQUAL:
+      bResult = !leftExpr.equalsIgnoreCase(rightExpr);  // Compare strings - this also works for hexadecimals
+      break;
+    case  COMPARE_OPERATOR_STRING_NOT_CONTAINS:
+      bResult = (leftExpr.indexOf(rightExpr) < 0);
       break;
   }
   return bResult;